(4)Assemble your own 96-Well Multi-Tier™ Micro Plate System:0.5mL System Requires Base Plate only0.75mL System Requires one Spacer and Base Plate1.0mL System Requires two Spacers and Base Plate2.0mL System Requires three Spacers and Base Plate

ABS Base Plate - ABS (Acrylic Butyl Styrene) has good chemical resistance against acid and bases, are heat resistant up to 80°C, and can be centrifuged to 2,500 rpms.